TW440656B - Centrifugal pump unit - Google Patents

Abstract

The centrifugal pump unit comprises a flow switch arranged within the pump housing in the flow path of the delivery fluid, which essentially consists of an electromagnetic switch device and a two-armed, pivotably mounted lever whose one arm projects into the flow path and whose other arm carries a magnet which is in contact-free active connection with the switch device. The switch device is arranged within a terminal box mounted on the unit housing. The lever is seated within a switch housing which is incorporated in a cartridge-like manner into the pump housing and which is hermetically sealed to the outside and which is arranged neighbouring the terminal box that such it is only in magnetic active connection so that the reed contact located in the terminal box is controlled by the magnet located in the switch housing. In this manner a usual terminal box may be used which does not need to be sealed with respect to the delivery flow.

Description

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[Background of the Invention],: and a centrifugal pump unit with various features specified in the preamble of the first patent application. In the day, the top-up centrifugal pump is used to increase the pressure, as is commonly referred to as the pressurization system: ί It is when the central water source can not always have a sufficiently high operating pressure, L hangs on the house item's water storage tank for women Then, the tank is filled with water from a central water source to a certain degree, and when needed, flows from the tank to a water-receiving position of a residence below the tank. As such, when the delivery pressure in the central supply pipe drops or the water supply stops, water can still be discharged. Since the static pressure due to the height difference between the water storage tank and the discharge position is almost small, it must be used when an electric or gas-driven water heater or similar unit is required that has a minimum water flow. Such a booster pump. A booster pump is usually used to increase the pressure from 0.6 to 0.8 bar. The water delivery flow rate is 0.5 m, per hour. Since it is necessary to raise the water pressure only when it is necessary to move the water, these pumps are equipped with a flow switch for controlling the motor of the centrifugal pump unit when the water heater or the like is operated. When a water discharge valve at a water discharge position is opened ‘the flow switch is activated due to the occurrence of low static pressure water’, the switch activates the motor of the centrifugal pump unit so as to generate the required amount of pressure. Such a centrifugal pump unit belongs to the prior art. One such unit has been known to be dedicated to this purpose of use and includes a junction box that covers the motor housing over the pump housing and includes an electromagnetic switching device that effectively Attached to a two-armed pivotably-mounted lever disposed in this area of the flow channel. One arm of this rod sticks out

89105108.Ptd Page 5 4406 56 V. Description of the invention (2) In the flow channel, a magnet is mounted on the other arm, which controls the switch device in the form of a reed contact. The disadvantage of using this structure is that almost all parts are unique to this type of pump ', especially the structural design of the junction box is suitable for this specialized centrifugal pump unit. Because of this situation, the object of the present invention is to conceive a centrifugal pump unit whose structure is designed to be able to apply a large degree of standardized parts for mass production to reduce the manufacturing cost. According to the invention, this object is achieved by the features specified in item 1 of the scope of patent application. The advantageous composition of the present invention is specified in the scope of the attached patent applications and the following description. The basic idea of the present invention is to actually install a junction box at intervals from the flow switch, so that a junction box can be applied as it is, and it can also be applied. Other centrifugal pumps of this size are especially heating circulation pumps. In addition, the centrifugal pump unit can be used with or without a flow switch by placing it in a suitable housing with a switch housing in the form of a tube housing. Therefore, the pump unit not only simplifies the design, but also has a wide range of applications. The switch housing is hermetically closed to the outside and sealed from the casing. According to the present invention, a switch lever is provided in the switch housing. The # of the switch lever extends into the flow channel, and the other arm is provided with .-magnet. The magnet is located in the switch housing, while the switchgear is still located in the junction box as before. Therefore, the junction box and the switch housing are only magnetically connected to each other, but are completely separated from each other in space and in reality. Understandable: To ensure magnetic excitation

89105108.ptd Page 6 44 06 Γ V. Description of the invention (3) The excitation connection, the way to know and the 'is only the outside of the transport medium is airtight and can contact this transport flow, if it is stretched' a simple All suitable openings are advantageous, and in terms of application, the switch housing is completely closed to ensure that the normal, formable parts can be formed, the road, the other shaft, and the lever to ensure that the lever arm is perpendicular to the flow direction, It will form the basic wire box and the open box at the same time, the electrical sealing junction is closed, the switch housing is sealed, and the ring ring which fits into the sealing ring hole in the casing is preferably provided with any torsion. In this way, the tightly pivoted mounting part of the structure is not only equipped with the arm, but it is installed in the application. It is used to form the end. It is formed to fully correspond to the safety structure of the junction box of the flow-through housing. Therefore, The opening of the pump is sufficient for the cylinder assembly and rotation. Designed to make the switch tight. Including two magnets in the switch, the flow of the switch housing is as large as possible, the small moving channels are close to each other, and can be tightly set. All canceled. Under installation, the adjacent settings are fixed to the electrical seals. The sealing of the casing is ensured by the inside of the pump casing. The band shape is not only located in the pump housing, but also in the housing and the lever arm. A section of the cross-section of the resistance that can be formed by the flow has the flow before the passage. Otherwise, the motive shell is structured, but after the switch, it is enough to design the moving channel area with respect to the North Korea. The simple screw mentioned above has been used, which is to use the shell pair to the outside from the outside. The seal in the cylindrical area 4 is to be removable. The outer part of the pump casing is not required to be sealed. The reliable rod is made of a single piece of mold. This is the case, an arm extends into the flow channel and there is a pivot shaft. By means of deflection, the shape of a paddle protruding into the flow channel is such that when it resists' when it is located on the flow side. Profile of the paddle-like lever arm to produce a

39105108.ptd Page 7 J 440656 V. Description of the invention (4) Sensitive response. Although the technical solution according to the present invention allows the rod with two lever arms to be disposed in the conveying fluid, it is not necessary to provide a sealing structure between the two lever arms in the switch housing. The arm is perimeter, and the lever arm carries the magnet and the pivot shaft through an elastic sleeve. As such, it is possible to prevent contamination or attachments from entering this area of the switch case, or to prevent flow in this part of the case. The rod device is preferably designed so that the deflection of the paddle-shaped rod away from the flow channel acts on suan; the flow force on the stem is reduced. On the one hand, this is achieved by a suitable shaping of the pallet-like lever arm, on the other hand, it can be supported by a suitable design structure for the resetting of the lever. The resetting of the lever is preferably achieved by magnetism ^, for which purpose another magnet (auxiliary magnet) may be provided in the switch housing or outside the switch housing. According to the device, the magnet is- Attraction works. In general, the auxiliary magnet relative to the magnet provided on the lever arm has been polarized 'makes it repulsive to act on the former ^ This-the device is particularly desirable because it allows the pump housing to be selectively made of plastic, but also can be made of a kind of Made of ferromagnetic material, but there is no danger of blocking the rod near the chestnut wall due to magnetic forces. As described above, "the formation of the junction box and the switch housing according to the present invention" can be applied because the junction boxes are cheaply manufactured in a large batch of heating circulation pumps, of which only The circuit board installed in the connection box should be modified accordingly to install the reed relay in a suitable position. Such junction boxes known from heating circulation pumps usually include a secondary switch 'which adjusts the rotation speed for the heating circulation system. All

4406 56 V. Description of the invention (5) — ------- §Before use: 2 :: J: Don't be advantageous, the switch has on and off no matter how it is turned off: 'in the flow unit' is due to this Binning; 1 for special purpose. " Make a difference. Therefore, other series parts can be used [Detailed description of the invention] The centrifugal pump I shown in Figure I-: Lifting body I, the motor has: =: its content is-the electric power of the motor; the known square 4 疋 子 2 and A rotor 3, which is separated from the stator space by a tube housing of a rotor, including a motor. Inside. The shaft 4 of the impeller 5 is arranged in a series of shell β, the connection Wvt is connected to the motor housing 1, and includes a suction port connector 7, which is two-way into the suction nozzle of the impeller 5. As usual, there is a guide 〆 pressure contact f 6 ^, at the opening Γΐ of this head 8 connected in the radial direction of the impeller 5. Set in the range of Ting 1 channel 9-flow switch 10. The motor housing 1 is provided with a junction box 11, in which the wiring between the main power supply and the motor and all the electronics of the unit 12, can be identified from these parts in the representation according to FIG. A capacitive male boat I circuit board 13 and an ancient education device 14 arranged between the circuit board 13 and the wall of the housing are produced. The terminal box 11 is closed by a removable cover 15. . Said-a lever arm 18 extending into the channel 9 and a lever arm 19 extending to the other side. The lever arm 18 is designed as a clearly recognizable paddle shape as shown in Fig. 3, and its outer wheel is suitable for a cross section of the passage in this area ', so that it closes the passage 9 when the king is in the stop position. A lever arm 19 provided on the other side of the pivot shaft 17 forms a

The visual switch 1 on page 9 includes a lever i 6 formed as an injection-molded part, a pivot shaft 17, a lever arm extending into the channel 9, and a lever arm extending to the other side 1 9 + ϊίί on "Before.丄 厶 μ Winter: This book is cut on Λbita, and is popular 4 ^ 406 56 V. Description of the invention (6) A shelf on which the magnet 20 is fastened. The magnet 20 has a cylindrical shape and has a north-south pole along the axis of the cylinder so that one end face forms the north pole and the other end face is the south pole, as clearly shown in the magnetic field lines in FIGS. 7 and 8. The magnet 20 cooperates with the reed relay 14 provided in the junction box 11 to position the 50 reed relay at one or another switch position according to the position of the lever 16 or the magnet 20. Figures 7 and 8 show these two switch positions. With this structure, the switching is performed in the same way as in the stop position (Fig. 7), so that when there is no fluid flow in the channel 9, the motor is stopped and the motor is started in another deflection position (Fig. 8). The lever 16 is mounted in a three-part switch housing 2 丨. It includes a tube-like insert 22, which is substantially cylindrical in shape and is composed of two plastic injection-molded parts 22a and 22b. The insert includes an opening perpendicular to the insertion direction, and the opening communicates with the channel 9. The two insert half halves 22a and 22b are connected together by a fixing pin 23 and combined with a rod 丨 6. In this mounting position, the two halves are held in the shell 6 by corresponding cylindrical holes perpendicular to the channel 9. In addition, 'consisting of-a plastic injection-molded part', the housing 24 overlaps a cylindrical shoulder of the insert 2 2 β, because the switch housing 21 has a transmission not only in the area of the reverse lever arm 18 Fluid contact, and the inner space of the casing is filled with fluid. 'It only needs a sealing ring 25, and the casing 24 uses the sealing ring to seal the lateral hole in the pump casing 6. In order to prevent dirty attachments or the like from entering the housing 24, an elastic protective cover 26 is provided. The protective cover is mounted on the rod 16 on one side and the insert 22 on the other side. For assembly, first push the protective sleeve over the rod 16 'until the position it points to is approximately in the middle (see Figure 3). As in

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44 0656 V. Description of the invention (7) A protrusion 27 on the rod cannot slide out of its position. The edge of the sleeve is then fixed in the insert 22, and then the entire insert and the rod located thereon are fed into the housing 24 so as to then be accommodated in the lateral holes of the pump casing 6 'and provided on the housing by screws. Holes 28 secure it. A recess 29 is formed in the housing 24 to open outwards, and it can be passed before assembly, and a further magnet 30 (auxiliary magnet) is fixed on the bottom of the recess. The auxiliary magnet is also cylindrical, with south-north poles along its cylindrical axis. With this structure, the arrangement of the magnets 20 can be selected so that the poles 7 on the end face side are at positions facing each other, so that the magnets 20 are repelled by the magnets 30. The housing 24 includes a cavity which opens toward the passage and receives the lever arm χ 9 and an adjacent magnet-containing recess 29, which can be accessed from the outside, and the shape of the outer shell is adapted to the outer contour of the junction box. The recess 29 can only be accessed when the terminal box 丨 丨 or the motor housing 1 is removed and the pump housing 6 with the switch housing 21 is removed. The distance between the junction box 丨 丨 and the switch housing 21, especially the housing 24 can be selected, so that on the one hand, a free intermediate space is formed, but on the other hand, the 'magnet 2' reliably controls the reed relay. 4 . The function of the structure described above is as follows: in the initial position (Figure 7), no fluid flows in the channel 9. The repulsive force of the magnet 30 on the magnet 20 causes the lever η to pivot to the stop position shown in FIG. 7, where the paddle-shaped guard arm 8 closes the circulation passage 9 almost completely. Once opened to release water—the valve, due to static, force, a small amount of water flows through the pump, so that the result for the lever arm 18 is that first-class power is applied to it to turn it in The position σ is shown in Figure δ. By moving the magnet 20 relative to the reed relay 4, the switch position of the magnet 20 is changed.

89105108.ptc Page 11 Correction 440656 V. Flow of invention description (8). Only when the water discharge is completed and the valve is closed again, the lever 16 returns to the most phase position shown in Fig. 7, at this time, it is stopped. [Explanation of component number] 1 Motor housing 2 Stator 3 Rotor 4 Shaft 5 Impeller 6 Pump housing 7 Suction port connector 8 Pressure connector 9 Channel 10 Flow switch 11 Junction box 12 Capacitor 13 Circuit board 14 Reed relay 15 Cover 16 lever 17 Pivot shaft 18, 19 Lever arm 20 Magnet 21 Switch housing 22 Shell-shaped insert

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^ 44 06 5 P BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be described in detail through an embodiment shown in the accompanying drawings. These drawings are: FIG. 1 shows a longitudinal sectional view of a centrifugal pump unit according to the present invention; circle 2 shows the switch housing in an enlarged perspective view; FIG. 3 is a longitudinal sectional view through the switch housing; 2 shown in the switch housing, in which a housing and an insert are cut in half; Figure 5 is a longitudinal cross-sectional view through the switch housing, the cut surface relative to Figure 3 rotated by 90 °; FIG. 6 is an enlarged view showing details of the structure in FIG. 1 "VI " FIG. 7 is an initial position shown in detail according to FIG. 6, in which the magnetic field from the main magnet is shown, and FIG. 8 is shown in accordance with FIG. A deflected position of a paddle-like lever arm.

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Claims (1)

4406 56 --- VI. _Please patent scope also 1 'a kind of centrifugal pump unit, a flow switch is arranged in the pump casing to transfer the flow channel, and basically consists of an electromagnetic switch device and a Two arms and two tow-mounted rods, one of the rods extends into the flow channel, and the other arm is equipped with a magnet 'the magnet is connected to the switch device in a non-contact climbing connection, where' the switch device is set in a The terminal block 'where' at least the part of the rod on which the magnet is mounted is surrounded by a switch housing which is hermetically sealed from the outside and is separated from the terminal box and provided. Near the junction box. 2 · The centrifugal fruit unit of item 1 of the Shenjing patent scope, wherein the switch housing includes a portion that extends into the pump housing, the portion is basically cylindrical, and is blocked in the flow channel area And is integrated into the pump casing like a shell. 3. The centrifugal pump unit according to item 1 of the patent claim, wherein the 'suan switch housing includes a housing portion located outside the pump housing and a housing portion located inside the pump housing', of which only The portion of the casing located outside the pump casing is sealed from the pump casing. 4. For example, the centrifugal pump unit of the scope of patent application, wherein the lever arms are formed by a single piece of injection molding, the injection molding also includes a shaft provided between the lever arms, the shaft is used by the shaft pivot Installed in the switch housing. 5. For example, the centrifugal pump unit of the scope of patent application, in which the lever arm extending into the flow channel is designed in the shape of a paddle, and its outer contour is suitable for the cross section D of the flow channel in this area. The centrifugal pump unit of the scope of application for patent No. 1 in which-the lever arm is provided near the shaft-the elastic sleeve is protected against the fluid flow casing 89105108.ptd Page 15 4406 56 _ ^ _ 6. Application for patent protection. 7. In the case of the centrifugal pump unit under the scope of patent application, wherein the flow force acting on the rod is reduced, the deflection of the paddle-shaped arm away from the flow channel is increased. 8. For the centrifugal pump unit in the first scope of the patent application, there is a step switch, in which the unit is fully activated in one switch, and completely stopped in the other switch. The switch in the third switch depends on The lever position of the flow switch. 9. The centrifugal pump unit according to item 1 of the patent application, wherein an additional magnet is provided in the switch housing for resetting the rod. 10. The centrifugal pump unit according to item 1 of the patent application scope, wherein the other magnets are mutually exclusive with respect to the magnetic field directions of the magnets provided on the lever arm. 89105108.pld Page 16